24 doctors weighed in:

If I am having twins, will I have two placentas?

24 doctors weighed in
Dr. Pam Yoder
Obstetrics & Gynecology - Maternal Fetal Medicine
12 doctors agree

In brief: Depends--eggs, split

Twins from two eggs have two placentas (occasionally appear fused).
Some twins from one egg have two and some have only one placental mass, even though there may be two amniotic sacs. In the past placentas were evaluated at delivery. Now we can learn lots by ultrasound. Occasionally additional testing is needed after delivery to determine if one placental mass or two closely positioned placentas.

In brief: Depends--eggs, split

Twins from two eggs have two placentas (occasionally appear fused).
Some twins from one egg have two and some have only one placental mass, even though there may be two amniotic sacs. In the past placentas were evaluated at delivery. Now we can learn lots by ultrasound. Occasionally additional testing is needed after delivery to determine if one placental mass or two closely positioned placentas.
Dr. Pam Yoder
Dr. Pam Yoder
Thank
1 comment
Dr. Kathleen Cullen
I was blessed with fraternal boy girl twins...they were in 2 sacs and each had their own placenta. Identical twins are different . They usually share a sac and placenta.
Dr. Pam Yoder
Obstetrics & Gynecology - Maternal Fetal Medicine
4 doctors agree

In brief: Ask for ultrasound

This is a complex topic so i answered it three ways https://www.
Healthtap.Com/user_questions/4130 bottom line, it depends on number of eggs & time of cleavage 2 eggs 2 placentas 2 sacs (dizygotic dz, dichorionic-diamniotic) 1 egg 2 placentas 2 sacs (monozygotic mz, di-di) 1 egg 1 placental mass 2 sacs (mz monochorionic-diamniotic) 1 egg 1 placental mass 1 sac (mz monochorionic-monoamniotic).

In brief: Ask for ultrasound

This is a complex topic so i answered it three ways https://www.
Healthtap.Com/user_questions/4130 bottom line, it depends on number of eggs & time of cleavage 2 eggs 2 placentas 2 sacs (dizygotic dz, dichorionic-diamniotic) 1 egg 2 placentas 2 sacs (monozygotic mz, di-di) 1 egg 1 placental mass 2 sacs (mz monochorionic-diamniotic) 1 egg 1 placental mass 1 sac (mz monochorionic-monoamniotic).
Dr. Pam Yoder
Dr. Pam Yoder
Thank
2 comments
Dr. Jeff Livingston
Nice summary.
Dr. Pam Yoder
Thanks.
Dr. Angela Savatiel
Obstetrics & Gynecology
2 doctors agree

In brief: Yes

All fraternal (non-identical ) twins have their own placentas.
Some identical twins do share a placenta and a bag of water; this is the least common type of twin pregnancy and can be identified by ultrasound. Identical twins that share placenta and bag of water are at high risk of complications.

In brief: Yes

All fraternal (non-identical ) twins have their own placentas.
Some identical twins do share a placenta and a bag of water; this is the least common type of twin pregnancy and can be identified by ultrasound. Identical twins that share placenta and bag of water are at high risk of complications.
Dr. Angela Savatiel
Dr. Angela Savatiel
Thank
Dr. Padmavati Garvey
Obstetrics & Gynecology
1 doctor agrees

In brief: Yes

Usually yes but not always.
Sometimes with twins, they can share one placenta. This is best seen on early ultrasounds.

In brief: Yes

Usually yes but not always.
Sometimes with twins, they can share one placenta. This is best seen on early ultrasounds.
Dr. Padmavati Garvey
Dr. Padmavati Garvey
Thank
Dr. Patrick Weix
Obstetrics & Gynecology
1 doctor agrees

In brief: Yes

Twins will have two placentas.
In some cases, the placentas grow next to each other and can "fuse", seeming to join into one large placenta with two cords. In some cases of identical twins, some of the membranes can be shared; those placentas are always fused.

In brief: Yes

Twins will have two placentas.
In some cases, the placentas grow next to each other and can "fuse", seeming to join into one large placenta with two cords. In some cases of identical twins, some of the membranes can be shared; those placentas are always fused.
Dr. Patrick Weix
Dr. Patrick Weix
Thank
Dr. Michael Traub
Fertility Medicine

In brief: Yes

Some twin pregnancies have clearly separate placenta.
Some twin pregnancies share the same placenta. And sometimes there can be 2 placenta that share the same blood supply. When you have twins it is very important for your doctor to know what type of placentas you have by looking on your ultrasound.

In brief: Yes

Some twin pregnancies have clearly separate placenta.
Some twin pregnancies share the same placenta. And sometimes there can be 2 placenta that share the same blood supply. When you have twins it is very important for your doctor to know what type of placentas you have by looking on your ultrasound.
Dr. Michael Traub
Dr. Michael Traub
Thank
Dr. Craig Keathley
Obstetrics & Gynecology

In brief: Yes

Most twins are dichorionic meaning each twin has his or her own placenta.
The placentas are frequently fused and deliver together, but the vasculature of each placental bed is separate. Monochorionic twins share a placenta and may have connections between each twin's blood supply.

In brief: Yes

Most twins are dichorionic meaning each twin has his or her own placenta.
The placentas are frequently fused and deliver together, but the vasculature of each placental bed is separate. Monochorionic twins share a placenta and may have connections between each twin's blood supply.
Dr. Craig Keathley
Dr. Craig Keathley
Thank

In brief: Yes

If the babies developed because 2 different eggs were fertilized forming 2 different embryos, there will always be 2 placentas.
If, however, an egg was fertilized, formed an embryo, and then divided into 2 identical embryos, there may be 1 or 2 placentas, depending on what stage of development the embryo was at when it split into 2 identical parts.

In brief: Yes

If the babies developed because 2 different eggs were fertilized forming 2 different embryos, there will always be 2 placentas.
If, however, an egg was fertilized, formed an embryo, and then divided into 2 identical embryos, there may be 1 or 2 placentas, depending on what stage of development the embryo was at when it split into 2 identical parts.
Dr. Katherine Sutherland
Dr. Katherine Sutherland
Thank
Dr. Scott Kramer
Gynecology

In brief: Yes

Two placentas (though often fused into appearing as one) occur if your twins are from 2 eggs (non-identical), or if one fertilized egg that splits early into two completely separate pregnancies.
While interesting it's of little significance regarding babies outcomes.

In brief: Yes

Two placentas (though often fused into appearing as one) occur if your twins are from 2 eggs (non-identical), or if one fertilized egg that splits early into two completely separate pregnancies.
While interesting it's of little significance regarding babies outcomes.
Dr. Scott Kramer
Dr. Scott Kramer
Thank
Dr. Robert Benner
Obstetrics & Gynecology

In brief: Yes

Most twins each have their own placenta.
If they are dizygotic (fraternal) twins, there will be two placentas, although the placentas can fuse together. Monozygotic (identical) twins can share a single placenta or each have their own, depending on how early the embryo splits. These can also fuse together or remain completely separate.

In brief: Yes

Most twins each have their own placenta.
If they are dizygotic (fraternal) twins, there will be two placentas, although the placentas can fuse together. Monozygotic (identical) twins can share a single placenta or each have their own, depending on how early the embryo splits. These can also fuse together or remain completely separate.
Dr. Robert Benner
Dr. Robert Benner
Thank
Get help from a real doctor now
Dr. Dennis Higginbotham
Board Certified, Obstetrics & Gynecology
26 years in practice
49M people helped
Continue
108,000 doctors available
Read more answers from doctors